I feel that in usage, lyrical is the 'soft jazz' that is always done to sad, angsty, nostalgic or sweet songs. In usage, 'contemporary' usually means 'modern jazz' or 'new jazz' that is done to more of a variety of music.
The greatest integer function of a real number x is represented by f(x) = [x] or |_x_|. For all real numbers x, the greatest integer function returns the largest integer less than or equal to x. In other words, the greatest integer function rounds down a real number to the nearest integer.
To find either the Least Common Multiple (LCM) or Greatest Common Factor (GCF) of two numbers, you always start out the same way: you find the prime factorizations of the two numbers. Then you put the factors into a nice neat grid of rows and columns, and compare and contrast and take what you need.